docs: def bandwidth(self, subid, params=None):
          ''' /v1/server/bandwidth
          GET - account
          Get the bandwidth used by a virtual machine
  
          Link: https://www.vultr.com/api/#server_bandwidth
          '''
          params = update_params(params, {'SUBID': subid})
          return self.request('/v1/server/bandwidth', params, 'GET')